Table 3.

Multiple regression analysis of variables for total gonadotropin dose and duration of stimulation

Variable	Multiple regression analysis
	Gonadotropin dose, total for cycle (IU)a		Duration of stimulation (days)b
	β value	P value	β value	P value
Age (years)	0.316	0.001	0.073	0.259
Years of infertility	−0.025	0.707	0.044	0.498
BMI (kg/m2)	0.136	0.043	0.179	0.007
PCOS	0.029	0.663	0.178	0.008

BMI body mass index, PCOS polycystic ovary syndrome

^aAdjusted R² = 0.10

^bAdjusted R² = 0.07